System of electrical distribution.



Patented Oct. 12, 1909. I SHEETS-SHEET 1.

F G BEETEM I SYSTEM OF ELECTRICAL DISTRIBUTION. APPLICATION FILED FEB.12, 1908.

I llllmla IIIIIIIIIIH WM/meme P. G. BEETBM.

SYSTEM OF ELECTRICAL DISTRIBUTION. I APPLICATION FILED FEB. 12, 1908.

937,618 v Patented Oct. i 9.

. y. m (5F I I IIJIII' IMMMX W a, a v 7 TS UNKTED Parana oration.

FRANK G. BEETEM, OF PHILADELPHIA, ?ENNSYLVANIA, ASSIGNOR TO THE ELECTRICSTORAGE BATTERY COMPANY, OF PHlLADELil-nA, PENNSYLVANIA, A' CORPORA-TION OF NEW JERSEY.

SYSTEM OF ELECTRICAL DISTRIBUTION.

Specification of Letters E'atent.

Patented (Mat. 12, 190% is employed to compensate for fluctuationsarmature between brushes 7 of load or voltage on an electric circuit.

The principal object of my invention is to provide more sensitive meansfor controlling the operation of the battery.

The nature and scope of my invention will be more fully understood byreferring to the accompanying diagrams, in which Figure 1, shows aspecially designed dynamo connected in series between the battery andthe circuit and arranged to act as a battery booster, while in Fig. 2, abooster of the usual type is employed and the specially designed dynamois employed as an exciter for controlling the field of the,

booster.

Referring to Fig. 1, G, is the main gen orator supplying current to thecircuit 1, :2, to which are connected translating devices I),constituting a fluctuatin load. Across the circuit 1, 2, is connected astorage battery C. In series between the battery and conductor 1, isconnected a dynamo electric machine A, which may be suitably driven inany manner. This machine as here shown is provided with a bi-polar woundarmature H, revolving in a field structure provided with four polarprojections N, N S and S Two pair of brushes are shown or which one pair9 and 10, are short circuited, while the other pair 7 and 8, areconnected between the battery and conductor 1. Two field windings areshown on the poles of this machine. One of these 3, i, 5, (3, is aseries Winding connected in series between brush 7,,and conductor 1.lhis winding is designed to exactly neutralize the armature to actiondue to current flowing through the and 8.. The other field winding 12,13, 1a, 15, is connected between the carbon regulator R and the middlepoint of the battery. The carbon regulator R, consists, of two piles ofcarbon disks D and D the pressure on which may i be varied by the leverL, so as to increase 7 the pressure on one pile and simultaneouslydecrease the pressure on the other. The operation of the lever L, iscontrolled by an adjustable spring U, at one end and a solenoid T, atthe other. the latter being connected into the conductor 1, so as tocarry the output of the generator G. tion of this regulator willtherefore respond to small variations of current in the conduct-or 1, soas to produce a flow of current v in either directionthrougl'r the fieldwinding 12, 13, 14, 15 according to whether the output from thegenerator G, is slightly above or below some predetermined average. Thefield winding 12, 13, 1d, 15, is so designed that a flow of currentthrough this winding will produce a field whose axis will This willproduce an elect-ro-motive-force between the brushes 9 and 10. Since thelatter brushes are short c1rcu1ted a very small magneto-motive-force ofthis current in the armature winding will produce a field whose axiswill be in the line connecting the brushes 9 and 10. The armature shouldbe designed with a very considerable armature re-action, so that a flowof current between the brushes 9 and 10, will produce the greatestpossible field strength. This field will in turn develop a veryconsiderable electromotive-force across the brushes 7 and 8, and thiselectro-motivo-force will cause the battery to charge or dischargeaccording to whether it is in the direction to oppose or assist theeloctro-motive-force of the battery.

It will be seen that the machine A, is designed to greatly multiply thecontrolling eliect of the carbon regulator, so that a very small flow ofcurrent produced by the car- 15', sutlicient to produce only a verysmall voltage across the brushes 9 and 10, will, by reason of the flowof current through the short circuit between those brushes, produce a.very considerable voltage across" the brushes 7 and 8.

In Fig. 2, the machine A, is connected as an e'aciter supplying current.to the field F, of the booster B, the latter being 'connected in seriesbetween the battery and conductor 1. The operation, however, of machineA,

The 'operaelectro-motive-force will produce a consider{ able flow ofcurrent between them, and the-- bon regulator in the field winding 12,13, 14:,

be in a line connecting the brushes 7 and 8.

is identical with that described in connection with Fig. l, the onlydiil'erence being that instead of controlling directly the charge anddischarge of the battery it controls indirectly by acting on the fieldof the booster.

While I have shown the machine A, controlled by the carbon regulator R,which latter responds to small changes of load on the generator G, itwill be understood that many other means for controlling the ma chine A,in response to changes of electric condition on a circuit. may beemployed. I do not, therefore, limit myself except as the prior state ofthe art may require, but

What I do claim and desire to procure by Letters Patent is:

1. In combination an electric circuit, a branch circuit including astorage'battery connected thereto, an armature having an appropriatecommutator and field structure, two sets of brushes bearing upon thecommutator whereof one set is electrically interconnected. and the otherset provided with connections for controlling the battery current 'inthe battery branch, a winding on the field structure operativelyarranged to positively respond to changes of load on the circuit andadapted to develop an electro motiveforce between the interconnectedbrushes t0 cause a variable flow of current between the other brushestoconipensatc for changes of load on the circuit.

2. In combination an electric circuit, a branch circuit including astorage battery connected thereto, an armature having an appropriatecommutator and field structure, two sets of brushes bearing upon thecommutator whereof one set is electrically intercon nected and the otherset is provided with connections for controlling the battery current inthe battery branch, a winding on the field structure operativelyarranged to positively respond to changes of load on the circuit andadapted to develop an electromotive-force between the interconnectedrushes to cause a variable flow of currrent between the other brushes tocompensate tor changes of load on the circuit, and a second winding onthe field structure connected in series with the second set of brushesand adapted to compensate for the arn'lature re action due to a fiow ofcurrent from these brushes.

3. In combination an electric circuit, a storage battery in operativerelation thereto, an armature having an appropriate commutator and fieldstructure, two sets of brushes bearing upon the connnutator whereoi' oneset is electrically interconnected and the other set is provided withconnections for controlling the current from the storage battery, awinding on the field structure adapted to produce a magnetic field andan elec tromotiveforce across the interconnected brushes, and aregulator for controlling the current in said winding and arranged topositively respond to the load on the circuit.

4,. in conil'iination an electric circuit, a storage battery inoperative relation thereto, an armature having an appropriateconnnutator and field structure, two sets of brushes bearing upon thecommutator whereoi one set is electrically interconnected and the otherset is provided with connections for controlling the current from thestorage battery, a winding on the field structure adapted to produce amagnetic field and an electro-motive-force across the interconnectedbrushes, a regulator for controlling the current in said winding andarranged to positively respond to the load on the circuit, and a secondwinding on the field structure connected in series with the second setof brushes and adapted to compensate for the armature reaction due to afiow of current from these brushes.

In testimony whereof I have hereunto signed my name.

FRANK Gr. BEETEM.

In the presence of- (lmrroiu) K. CAssuL, FRANK l). liizimcn.

